The Ball Mill Abrasion (BMA) test was developed by the University of Queensland Materials Performance group to simulate the high stress abrasion conditions experienced in production ball mills. It gives accurate predictions of the service life of wear resistant alloys in mill liner and grinding media applications. In this paper the BMA test methodology was applied to investigate the wear rates of four grades of grinding media using two small laboratory ball mills. The rankings obtained from the tests were identical with those from the full BMA test, although the difference between the different grades was not as marked. It is concluded that untrained personnel can use a simple small-scale procedure to evaluate relative but not absolute grinding media wear rates.

Key words: grinding media; wear rate; ball mill abrasion test.

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